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onsemi 1N5934BG
- Part No.:
- 1N5934BG
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N5934BG.pdf
- Description:
- DIODE ZENER 24V 3W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:492
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Product details
Overview
1N5934BG from onsemi is a 3 W, 24 V ±5% Zener diode in DO-41 axial package, designed for precision voltage regulation and overvoltage protection in DC power rails. It delivers 18.2 mA maximum Zener current (IZM), exhibits 15.6 Ω dynamic impedance at 19 mA test current (ZZT), and maintains <0.25 μA leakage at 18.2 V reverse bias (IR @ VR).
For engineers reviewing the 1N5934BG datasheet, pinout, applications, or equivalent options, key selection criteria include its 24 V nominal Zener voltage with tight ±5% tolerance, 98 W surge rating at 1 ms, ESD robustness (>16 kV HBM), thermal derating behavior above 75°C, and compatibility with standard leaded PCB assembly processes.
Technical Context
The 1N5934BG operates as a silicon-oxide passivated junction Zener regulator, optimized for stable reverse-biased breakdown at 24 V under controlled thermal conditions (TL = 30°C). Its design targets steady-state DC regulation rather than high-frequency transient suppression, with specified performance validated at IZT = 19 mA and VR = 18.2 V.
Thermal management relies on lead-to-ambient conduction: maximum power dissipation drops linearly from 3 W at TL = 75°C to zero at TL = 125°C, and its junction-to-lead thermal resistance (θJL) is defined for 3/8″ lead length. The cathode-band polarity marking ensures unambiguous orientation during manual or automated placement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.8–25.2 V at IZT = 19 mA; enables precise 24 V rail clamping with ±5% tolerance across temperature and production lot. |
| Max Power Dissipation (PD) | 3 W at TL = 75°C; supports continuous regulation in compact, non-heatsinked designs with adequate lead length (≥3/8″). |
| Zener Impedance (ZZT) | 15.6 Ω at IZT = 19 mA; ensures low output voltage variation under load current changes in feedback or reference circuits. |
| Reverse Leakage (IR) | <0.25 μA at VR = 18.2 V; minimizes standby power loss in battery-backed or low-quiescent systems. |
| Surge Rating | 98 W for 1 ms non-repetitive pulse; provides robust transient overvoltage immunity without requiring external crowbar devices. |
| ESD Rating | Class 3 (>16 kV) per Human Body Model; allows safe handling and board-level integration without additional ESD protection circuitry. |
| Operating Temp Range | −65°C to +200°C; suitable for under-hood automotive, industrial control, and aerospace environments where wide ambient extremes occur. |
Pinout & Package
Package: DO-41 (Case 59-10), axial-leaded, void-free thermosetting plastic housing with corrosion-resistant, solderable leads. Cathode identified by black band; mounting position unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-bias anode connection point | Connected to regulated voltage node; must be held at higher potential than anode to enable Zener conduction. |
| Anode (unbanded end) | Reverse-bias cathode return path | Typically tied to ground or lower-potential rail; completes current path during regulation or surge events. |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free DO-41 package | Meets RoHS compliance requirements without sacrificing thermal or mechanical performance of legacy 1 W-sized footprint. |
| 6-parameter guaranteed limits | Ensures production consistency across VZ, ZZT, IZK, ZZK, IR, and IZM - critical for safety-critical voltage references. |
| Surge-rated construction | Withstands 98 W transient pulses (1 ms), eliminating need for parallel TVS diodes in many industrial input protection designs. |
| High-temperature operation | Rated up to +200°C junction temperature, enabling use in engine control units and downhole electronics without derating penalties. |
| Soldering compatibility | Leads rated for 260°C for 10 seconds at 1/16″ from case - compatible with standard reflow and hand-soldering processes. |
Applications
| Industrial Power Supply Reference | Automotive ECU Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback divider in 24 V offline AC-DC adapter secondary side. IC Role / Device Role / Timing Role: Voltage reference element defining output setpoint via resistive divider network. Use Value: Tight ±5% VZ tolerance and low 15.6 Ω ZZT minimize output drift across line/load/temperature, improving overall regulation accuracy to ±1.5%. |
Use Scenario: Protecting microcontroller I/O pins and sensor interfaces against load-dump transients in 24 V truck ECUs. IC Role / Device Role / Timing Role: Standby shunt clamp activated only during >28 V surges, diverting excess energy to ground. Use Value: 98 W 1 ms surge rating absorbs ISO 7637-2 Pulse 5a energy without degradation, extending system lifetime beyond discrete TVS alternatives. |
| Programmable Logic Controller Input Protection | Telecom DC-DC Converter Feedback |
Use Scenario: Safeguarding 24 V digital input modules from field-wiring faults and induced surges. IC Role / Device Role / Timing Role: Primary overvoltage limiter placed before optocoupler input stage. Use Value: Sub-microamp leakage (<0.25 μA) prevents false triggering in high-impedance sensing circuits while maintaining fast response to transients. |
Use Scenario: Providing stable 24 V reference for error amplifier in isolated 48 V to 24 V telecom DC-DC converter. IC Role / Device Role / Timing Role: Precision voltage reference setting feedback loop gain and output accuracy. Use Value: Low 15.6 Ω dynamic impedance ensures minimal reference perturbation during dynamic load steps, improving transient response stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5934BRLG | Same electrical specs but supplied in 6000-unit tape-and-reel format instead of 2000-unit box; identical DO-41 package and Pb-free construction. | Optimized for automated SMT placement lines requiring reel-fed feeders; not suited for manual prototyping or low-volume hand assembly. | Select 1N5934BRLG when integrating into high-volume pick-and-place manufacturing with compatible feeder hardware. |
| MMBZ5242B | SOT-23 surface-mount package; 24 V ±5%, 225 mW power rating; 20 Ω Zener impedance at 10 mA; max IZM = 9.2 mA. | Designed for space-constrained PCBs and low-power signal-level regulation; lacks surge capability and high-temp endurance of 1N5934BG. | Choose MMBZ5242B only for low-current biasing or portable electronics where board area is critical and surge immunity is not required. |
Compared with 1N5934BG, 1N5934BRLG offers identical performance in a tape-and-reel format for automated production, while MMBZ5242B trades power handling and ruggedness for miniaturization - making 1N5934BG the preferred choice for industrial and automotive power-rail regulation where reliability under stress is mandatory.
Availability
1N5934BG is available at Aetrix Electronics and suitable for industrial power supplies, automotive electronic control units, programmable logic controller input stages, and telecom DC-DC converters requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5934BG includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1N5934BG belongs to the 1N5913B Series of 3 W Zener regulators, engineered for high-reliability voltage reference and overvoltage protection in harsh-environment applications where thermal stability and surge resilience are critical.
FAQ
What is the Zener voltage tolerance of the 1N5934BG?
The 1N5934BG has a nominal Zener voltage of 24 V with a guaranteed tolerance of ±5%, meaning its actual breakdown voltage falls between 22.8 V and 25.2 V when measured at IZT = 19 mA and TL = 30°C. This tolerance is assured across production lots and is explicitly guaranteed in the onsemi datasheet's Electrical Characteristics table.
Can the 1N5934BG be used in surface-mount designs?
No - the 1N5934BG uses a DO-41 axial-leaded package (Case 59-10) intended for through-hole mounting. It is not compatible with standard SMT reflow profiles or pick-and-place equipment. For surface-mount equivalents, consider the MMBZ5242B (SOT-23, 225 mW) or SMAZ24 (SMA, 1 W), though neither matches the 1N5934BG's 3 W rating or 98 W surge capability.
What is the maximum allowable lead temperature during soldering of the 1N5934BG?
The 1N5934BG is rated for a maximum lead temperature of 260°C for 10 seconds at a distance of 1/16″ from the case body. This specification ensures reliable solder joint formation without damaging the internal silicon junction or package integrity, and aligns with IPC-J-STD-020 moisture sensitivity level exemptions for this device.
How does the 1N5934BG perform under elevated ambient temperatures?
The 1N5934BG's steady-state power dissipation is derated linearly above 75°C lead temperature: it delivers 3 W at TL = 75°C, decreasing by 24 mW/°C until reaching zero at TL = 125°C. At TA = 50°C (free-air), its usable power drops to 1 W with 6.67 mW/°C derating - requiring careful thermal design in enclosed or high-ambient environments.
Is the 1N5934BG suitable for automotive load-dump protection?
Yes - the 1N5934BG is widely deployed in 24 V automotive ECUs for load-dump clamping due to its 98 W 1 ms surge rating, −65°C to +200°C operating range, and robust silicon-oxide passivated junction. It meets ISO 7637-2 Pulse 5a requirements when properly heatsinked and mounted with ≥3/8″ lead length, making it a proven solution in commercial vehicle electronics.
1N5934BG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 19 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 18.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N5934BG FAQ
1.How can I place an order for 1N5934BG through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5934BG on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1N5934BG reliable?
The price and inventory of 1N5934BG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5934BG is usually 5 days.
3.What payment methods are accepted for 1N5934BG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5934BG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5934BG?
1N5934BG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5934BG order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1N5934BG?
For technical support, including 1N5934BG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5934BG requirements.
6.How does Aetrix verify that 1N5934BG is sourced from the original manufacturer or authorized distributors?
All 1N5934BG products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N5934BG meets industry standards.
7.What is the process for return or replacement of 1N5934BG?
All 1N5934BG units undergo pre-shipment inspection (PSI). If there is an issue with 1N5934BG, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1N5934BG part is unused and in its original packaging.
Return procedure for 1N5934BG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5934BG Tags
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